height,weight=eval(input("请输入身高（米）和体重（公斤）:"))
bmi=weight/pow(height,2)
print("BMI的数值为:{:.2f}".format(bmi))
who=""
if bmi<18.5:
    who="偏瘦"
elif 18.5<=bmi<25:
    who="正常"
elif 25<=bmi<28:
    who="过重"
elif 28<=bmi<32:
    who="肥胖"
elif bmi>32:
    who="严重肥胖"
print("BMI指标：{}".format(who))